Question

I. A train runs from New Delhi to Hyderabad. It covers first distance of 420 km in 7 hrs. and next distance of 360 km in 6 hrs.
II. Gopi takes part in a car race. He drives a distance of 70 km each in the first, second and third hours.
Which of the following statements is true.
a) I, is an example uniform motion and II is an example of non-uniform motion.
b) I is an example of nonuniform motion and II is an example of uniform motion.
c) I and II are examples of uniform motion.
d) I and II are examples of nonuniform motion.​

Answer 1

Explanation:

Speed of train while covering a distance of 240 \ km, u=

7

240

=34.3 km/h

Speed of train while covering a distance of 360 \ km, u=

6

360

=60 km/h

Thus speed of train changed and hence motion of train is an example of non-uniform motion.

II :

Speed of Gopi in the car race remains the same in first, second and third hour.

Thus his motion is an example dof uniform motion.

Correct answer is option B.